HiPPO matrix used

[simonrydder]

I am reading the paper and is unsure which of the three HiPPO matrices you use. It looks from equation (2) that you use HiPPO-LegS but in appendix C1 you write that you primarily use HiPPO-LegT.
What is the default implementation and what configuration should I change to use a specific one? :)